Perming and dyeing hair while preparing for pregnancy may have an effect, which may affect the development of the embryo and cause miscarriage. The main substances in hair dyes are aromatic amine compounds, which is a kind of chemical synthetic dyes containing carcinogens, and p-phenylenediamine in hair dyes is a kind of high sensitizers, which is easy to lead to genetic mutation in human body. These chemicals may enter into the body through the pores from the roots of the hair, which will be harmful to the mother’s body and affect the quality of the ovum, and will cause hidden dangers to the development of the baby. During the preparation for pregnancy, if you color your hair and find that you are already pregnant, there is no need to terminate the pregnancy. Not all hair coloring affects the fetus, and it is important to seek medical attention and regular maternity checkups. Women try not to dye hair during pregnancy preparation, do a good physical examination, adjust lifestyle, avoid staying up late and other behaviors, supplement nutrition, pay attention to the balanced diet structure. At the same time can be appropriate exercise, improve the body’s immunity, to ensure that the mood is happy.